Our house beers are the voice of the member-owners. Through tasting panels and member-owner beer-design meetings, our brewers design beers that our members want. Our house beers are broken down into series–Rational, Irrational, and Infinite. If you notice a math motif present in our beer names, that's intentional. Our original head brewer, Jeff Young, wanted to ingrain his love of math into our beer roster--so you’ll see traces of these themes throughout.

Rational BeersRational Beers, like rational numbers, are constructible. For example: 3/2 equals 1.5, and a traditional porter with a dose of molasses yields our Recalcitrant Dockhand. Our Rational Beers exemplify the wonderful, natural consequences of combining well-defined, simple ingredients in new and creative ways. These beers won’t shock you, but with their classical pleasures, they don't need to.

Irrational BeersIrrational Beers, like irrational numbers, require more than simple ingredients for their construction. From the wild fermentation of Waterloo to the depth and elegance of Rover, there’s an added complexity to these beers that’s not easily predicted. Their range will keep you coming back for more, but be careful--some of our Irrational Beers pack quite a punch.

From local favorites to international delights, our guest tap wall is curated by the pub team to feature the best beers in the world. The roster is changing constantly, so be sure to stop in to see what's new on the wall.

When in Montana, please visit our friends at the Great Northern Brewing Company, brewer of ‘Black Star’ Golden Lager. Black Star Co-op independently brews its own beers and is not affiliated with Great Northern Brewing Co.